USCG Exam PracticeSingle-screw maneuvering and prop walk
According to 46 CFR §184.620, a propulsion engine control system must be designed so that a loss of power to the control system results in which of the following?
- A. An automatic increase in shaft speed to maintain steerageway
- ✓ No increase in shaft speed or propeller pitchCorrect
- C. Immediate engine shutdown to prevent runaway propulsion
- D. Transfer of control to the secondary steering station
Why B is correct
46 CFR §184.620(c) states that a propulsion engine control system, including pilothouse control, must be designed so that a loss of power to the control system does not result in an increase in shaft speed or propeller pitch. This is a fail-safe design requirement to prevent uncontrolled acceleration upon control system power loss.
Cited:46 CFR §184.620